Because each cut has the potential to change the growth of the tree, no branch should be removed without a reason. Common reasons for pruning are to remove dead branches, to remove crowded or rubbing limbs, and to eliminate hazards. Trees may also be pruned to increase light and air penetration to the inside of the tree’s crown or to the landscape below. In most cases, mature trees are pruned as a corrective or preventive measure.
Trimming and cleaning up plants removes the leaves which no longer receive light and are otherwise useless. It is important to clean up the bottoms of the plants as it will increase airflow circulation around the room and underneath and through the plants. This will help lessen the risk of powdery Mildew finding a home.